rs769574194

Variant names:

• chr6-5613154-C-G
• rs769574194
• NM_006567.5:c.1066-15C>G

Your query was ambiguous. Multiple possible variants found:

• chr6-5613154-C-G
• chr6-5613154-C-T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_006567.5(FARS2):​c.1066-15C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,454,294 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: FARS2 NM_006567.5 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.796
• Publications: 0 publications found

Genes affected

FARS2 (HGNC:21062): (phenylalanyl-tRNA synthetase 2, mitochondrial) This gene encodes a protein that transfers phenylalanine to its cognate tRNA. This protein localizes to the mitochondrion and plays a role in mitochondrial protein translation. Mutations in this gene can cause combined oxidative phosphorylation deficiency 14 (Alpers encephalopathy). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

FARS2 Gene-Disease associations (from GenCC):

• metabolic disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• combined oxidative phosphorylation defect type 14

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hereditary spastic paraplegia 77

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Leigh syndrome

  Inheritance: AR Classification: MODERATE Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP6: Variant 6-5613154-C-G is Benign according to our data. Variant chr6-5613154-C-G is described in ClinVar as Likely_benign. ClinVar VariationId is 587664.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FARS2	NM_006567.5	c.1066-15C>G		intron_variant	Intron 5 of 6	ENST00000274680.9	NP_006558.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FARS2	ENST00000274680.9	c.1066-15C>G		intron_variant	Intron 5 of 6	1	NM_006567.5	ENSP00000274680.4
FARS2	ENST00000324331.10	c.1066-15C>G		intron_variant	Intron 5 of 6	1		ENSP00000316335.5
FARS2	ENST00000648580.1	n.1066-15C>G		intron_variant	Intron 5 of 8			ENSP00000497889.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000405 AC: 1 AN: 247100 AF XY: 0.00000748

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000887

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1454294 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 723606

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33204

American (AMR) AF: 0.00 AC: 0 AN: 43554

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26028

East Asian (EAS) AF: 0.00 AC: 0 AN: 39316

South Asian (SAS) AF: 0.00 AC: 0 AN: 85054

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53026

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1108290

Other (OTH) AF: 0.00 AC: 0 AN: 60066

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Combined oxidative phosphorylation defect type 14 Benign:1

Jun 13, 2018

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	6.5
DANN	Benign	0.66
PhyloP100		-0.80

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs769574194; hg19: chr6-5613387;